Long-Range Antiferromagnetic Spin Correlations in Scandium Metal

Wohlleben, D.

doi:10.1103/physrevlett.21.1343

Cited by 21 publications

(4 citation statements)

References 14 publications

(8 reference statements)

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“…(4) theoretically, it is measurable by the temperature dependence of the susceptibility as that thermal energy kT^Ejr'iO) at which the susceptibility begins to drop significantly with rising temperature. We find kT^ 0.005 eV for Ni 3 Ga 5 and kT^-0.01 eV for Sc, 9 i.e., these metals are distinguished by an extremely low intrinsic spinfluctuation energy. We therefore expect their magnetic properties to be sensitive to very small changes in Ej?'…”

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confidence: 71%

Decrease of Magnetization of Itinerant Electrons by Spin-Orbit Scattering on Impurities

Wohlleben

Luo

1969

Phys. Rev. Lett.

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and therefore the form of the potential is not expected to be important. Conversely for I = 1 the wave function around R M is not negligible and the I dependence of the potential must be taken into account. Now assuming, as Shaw did, a Coulomb potential for I ^ 1 and using the I -0 component of the HA model potential the importance of the / = 1 component is evident, since the energy wavenumber characteristic obtained is nearly coincident with the one calculated by Shaw. In the calculation of the form factor for / ^ 1, the core potential was further approximated by Z/Rj^ inside RM because for I ^ 1 the pseudowave functions are sensibly different from zero only around RM-We performed the same calculations by taking the HA model potential up to I = 2 and up to / = 3, but the results did not change significantly from the ones obtained with the usual HA model potential. We then conclude that it is importantThe effect of spin-orbit scattering on a system of conduction-electron spins is to reduce any spin polarization induced by an external field or electron-electron interactions. In nontransition metals, the spin susceptibility remains essentially unaffected by spin-orbit scattering even in the heaviest metals. 1 However, in some transition metals the effective mass of the d electrons is so large that their kinetic energy with respect to the lattice decreases to a few tenths of an electron volt, the order of magnitude of the spin-orbit energy in the atomic 4d and M shells, which therefore should bring about measurable effects.We note that the static magnetic susceptibility decreases monotonically from the M to the M elements without exception (at constant valency) and that there are no ordered magnetic states in the 4d and %d series. These trends are usually credited to an increase of the bandwidth in the heavier transition metals, but are certainly in part caused by spin-orbit scattering. 2 Several only to model the I = 0 and I = 1 component of the potential.authors have included the spin-orbit energy in their band-structure calculations. 3 Especially interesting is the influence of spin-orbit interactions on magnetic order in metals. Lenglart 3 has recently studied the stability of the paramagnetic state of Pd with special attention to the intrinsic spin-orbit scattering. It is also noteworthy that the Curie temperature of weak itinerant ferromagnets like Sc^In, Au 4 V, NigAl, and ZrZn 2 decreases very rapidly with increasing disorder of the lattice. One might ascribe this to spin-orbit scattering because the effective scattering cross section per ion should increase when the translational symmetry of the lattice breaks down.In this Letter, we present data which we believe to be the first unambiguous manifestation of conduction-electron spin-orbit scattering by impurities. We have measured the static susceptibility of dilute alloys of Sc with the tetravalent elements Ti, Zr, Hf, and Th and with the pentavalent elements V, Nb, and Ta. We have also The exchange-enhanced magnetic susceptibility of Sc and Ni 3 Ga decreas...

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confidence: 71%

Decrease of Magnetization of Itinerant Electrons by Spin-Orbit Scattering on Impurities

Wohlleben

Luo

1969

Phys. Rev. Lett.

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“…The existence of such a bound state has been proposed by Wohlleben. 12,17 In light of this model, however, the decrease.…”

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confidence: 99%

Magnetic properties of high purity scandium, yttrium, lanthanum and lutetium and the effects of impurities on these properties

Croat

1972

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“…On the other hand, AQ (10 O K ) for this alloy may be expected to increase by a t least As alluded to above, Sc depresses T, of Ce-16Y more strongly than does Lu or P u (or Y itself). A possible reason for this may be the incipient antiferromagnetism of Sc metal itself [19]. Sc as an impurity in certain magnetic hosts may be expected to affect the magnetism of the host more strongly than would a normal nonmagnetic impurity because of the tendency of the Sc d-electrons to become independently spin-correlated within the host lattice [19].…”

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“…A possible reason for this may be the incipient antiferromagnetism of Sc metal itself [19]. Sc as an impurity in certain magnetic hosts may be expected to affect the magnetism of the host more strongly than would a normal nonmagnetic impurity because of the tendency of the Sc d-electrons to become independently spin-correlated within the host lattice [19]. It seems not unlikely that the long-range correlations promoted by these d-electrons might be detrimental t o the cooperative interactions among the Ce f-electrons [ZO].…”

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Resistivity Minima in Y-Stabilized ß-Ce Alloys Impurity Effects

Hill

Elliott

1971

Phys. Stat. Sol. (a)

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Minima in the resistivity—temperature curves for the d.h.c.p. alloy Ce16 at%Y were induced by the addition of 5 or 10 at% of Sc, Lu, or Pu. The minima presumably result from an enhancement of the Kondo‐type scattering thought to exist in Y‐stabilized β‐Ce alloys but which at the 16 at%Y concentration, in the binary alloys, is apparently not strong enough to produce a resistivity minimum. The enhancement of the scattering caused by the addition of impurities is interpreted as being due to 1) a decrease in the overall Ce concentration in the alloy and 2) an impurity‐induced increase in the effective internal pressure on the Ce atoms in the alloy.

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Long-Range Antiferromagnetic Spin Correlations in Scandium Metal

Abstract: Alloys of Sc with magnetic impurities show strong anomalies in the concentration dependence of the impurity interaction temperature. This is interpreted with exchange enhancement of the susceptibility of metallic Sc near a finite wave vector.

Cited by 21 publications

References 14 publications

Decrease of Magnetization of Itinerant Electrons by Spin-Orbit Scattering on Impurities

Decrease of Magnetization of Itinerant Electrons by Spin-Orbit Scattering on Impurities

Magnetic properties of high purity scandium, yttrium, lanthanum and lutetium and the effects of impurities on these properties

Resistivity Minima in Y-Stabilized ß-Ce Alloys Impurity Effects

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